Connected: An Internet Encyclopedia
RFC 1122 - 3.2.1.2 Checksum: RFC-791 Section 3.1

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### 3.2.1.2 Checksum: RFC-791 Section 3.1

A host MUST verify the IP header checksum on every received datagram and silently discard every datagram that has a bad checksum.

Next: 3.2.1.3 Addressing: RFC-791 Section 3.2

Connected: An Internet Encyclopedia
RFC 1122 - 3.2.1.2 Checksum: RFC-791 Section 3.1